chore(deps): update dependency @babel/core to v7.3.4

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change	References
@​babel/core	devDependencies	patch	7.3.3 -> 7.3.4	homepage, source

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Release Notes

babel/babel

### [`v7.3.4`](https://togithub.com/babel/babel/blob/master/CHANGELOG.md#v734-2019-02-25) [Compare Source](https://togithub.com/babel/babel/compare/v7.3.3...v7.3.4) ##### :bug: Bug Fix - `babel-parser` - [#​9572](https://togithub.com/babel/babel/pull/9572) Fix TypeScript parsers missing token check ([#​9571](https://togithub.com/babel/babel/issues/9571)) ([@​elevatebart](https://togithub.com/elevatebart)) - [#​9521](https://togithub.com/babel/babel/pull/9521) Also check AssignmentPatterns for duplicate export name ([@​danez](https://togithub.com/danez)) - `babel-helper-create-class-features-plugin`, `babel-helper-replace-supers`, `babel-plugin-proposal-class-properties`, `babel-traverse` - [#​9508](https://togithub.com/babel/babel/pull/9508) Use correct "this" in static fields ([@​nicolo-ribaudo](https://togithub.com/nicolo-ribaudo)) - `babel-preset-env` - [#​9566](https://togithub.com/babel/babel/pull/9566) Closes [#​9465](https://togithub.com/babel/babel/issues/9465) ([@​zloirock](https://togithub.com/zloirock)) - `babel-types` - [#​9539](https://togithub.com/babel/babel/pull/9539) babel-types is\* type checks accept null | undefiend as value TS type ([@​ian-craig](https://togithub.com/ian-craig)) - `babel-plugin-transform-block-scoping`, `babel-traverse` - [#​9532](https://togithub.com/babel/babel/pull/9532) Migrate some duplicate binding tests to traverse ([@​danez](https://togithub.com/danez)) - `babel-generator` - [#​9524](https://togithub.com/babel/babel/pull/9524) Fix typescript generator params ([@​tanhauhau](https://togithub.com/tanhauhau)) - [#​9523](https://togithub.com/babel/babel/pull/9523) Fix flow babel-generator function parantheses ([@​tanhauhau](https://togithub.com/tanhauhau)) ##### :house: Internal - Other - [#​9561](https://togithub.com/babel/babel/pull/9561) Update CHANGELOG.md using the "Trigger GitHub release" action ([@​nicolo-ribaudo](https://togithub.com/nicolo-ribaudo)) - `babel-plugin-proposal-object-rest-spread`, `babel-plugin-transform-modules-systemjs` - [#​9541](https://togithub.com/babel/babel/pull/9541) Enable eqeqeq rule in eslint ([@​danez](https://togithub.com/danez)) - `babel-generator`, `babel-parser`, `babel-plugin-transform-flow-strip-types`, `babel-traverse` - [#​9522](https://togithub.com/babel/babel/pull/9522) Make tests spec compliant by avoiding duplicate declarations in input files ([@​danez](https://togithub.com/danez)) - `babel-plugin-transform-proto-to-assign` - [#​9533](https://togithub.com/babel/babel/pull/9533) Add import/no-extraneous-dependencies to ESLint ([@​nicolo-ribaudo](https://togithub.com/nicolo-ribaudo))

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